A unique case of capitalising mid-sentence and using apostrophe 's'

Firstly, I know there are several questions on here about apostrophe-s, as well as capitalising mid-sentence, but I think this is quite unique.

I have the below sentence:

"With an expanding fanbase, collaborations with several artists and support from the likes of the Roots drummer Questlove, she is on her way to success."

Now, "The Roots" is a band i.e. a noun so shouldn't "the" be capitalised? When I looked at a similar sentence in the Guardian, they seem to not capitalise:

The afro comb has long been associated with the 1970s, the accessory of a hairstyle that represented counter culture and civil rights during an important era for both. These days it makes a regular appearance on mainstream TV in America – the Roots drummer Questlove is fond of wearing one while performing as part of the house band on Late Night with Jimmy Fallon.

Second of all, since "the drummer" belongs to the band, does there need to be an apostrophe-s? Many publications seem to think so, such as the below from NME Magazine:

The Roots' drummer Questlove has apologised for an Instagram post which caused controversy and offended...

Lastly, if the above case is correct, shouldn't it be: "The Roots' drummer, Questlove, has..." with commas around his name, as in the following example:

The singer showed off his skills during an appearance on ‘The Tonight Show,’ and even took on The Roots’ drummer, Questlove, in an epic battle.

Similar occurrences would occur if talking about a band like "The Beatles", for instance.

I was tempted to just follow conventions of the Guardian, but there are a low of conflicting uses so I'm not sure. I suppose a solution could be to just omit "the" and say "...support from the likes of Roots drummer Questlove", but "the" is part of the actual title of the band and I would like to know for future reference too.

Your expertise is greatly appreciated!

When you use a proper noun containing the as an adjective, you usually drop the. So you would say

former Roots member, Malik B,

and not "former The Roots member".

Similarly, even without a the in the band name, you could use the:

the Coldplay drummer, Will Champion.

So you can make a good case that the in the Roots dummer Questlove is not part of the name The Roots.

In this case I think pragmatism has to win out. I therefore go with the Guardian. In any case, I don't think the apostrophe is necessary.

Since the band's name is 'The Roots' then the Guardian might have written:

These days it makes a regular appearance on mainstream TV in America – the The Roots drummer Questlove is fond of wearing...

but the doubling effect of 'the The' is clumsy and unpronounceable.

With regard to adding commas in order to parenthesize 'Questlove'. I don't see the need. The original version is easily read and understood. Adding more and more punctuation can become counterproductive.

I hope this answer is useful. Comments are welcome if I need to change or improve it.

Note - 20 Sep 2015 - I have edited in deference to the comments below, which I see as being valid.